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110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/* LZMA Compress Implementation
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Copyright (c) 2012, Nikolaj Schlej. All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHWARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*/
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#include "LzmaCompress.h"
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#include "SDK/C/7zVersion.h"
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#include "SDK/C/LzmaEnc.h"
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#include <stdlib.h>
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#define LZMA_HEADER_SIZE (LZMA_PROPS_SIZE + 8)
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static void * AllocForLzma(void *p, size_t size) { (void)p; return malloc(size); }
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static void FreeForLzma(void *p, void *address) { (void)p; free(address); }
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static ISzAlloc SzAllocForLzma = { &AllocForLzma, &FreeForLzma };
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SRes OnProgress(void *p, UInt64 inSize, UInt64 outSize)
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{
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(void)p; (void) inSize; (void) outSize;
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return SZ_OK;
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}
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static ICompressProgress g_ProgressCallback = { &OnProgress };
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STATIC
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UINT64
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EFIAPI
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RShiftU64(
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UINT64 Operand,
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UINT32 Count
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)
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{
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return Operand >> Count;
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}
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VOID
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SetEncodedSizeOfBuf(
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UINT64 EncodedSize,
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UINT8 *EncodedData
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)
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{
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INT32 Index;
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EncodedData[LZMA_PROPS_SIZE] = EncodedSize & 0xFF;
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for (Index = LZMA_PROPS_SIZE + 1; Index <= LZMA_PROPS_SIZE + 7; Index++)
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{
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EncodedSize = RShiftU64(EncodedSize, 8);
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EncodedData[Index] = EncodedSize & 0xFF;
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}
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}
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INT32
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EFIAPI
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LzmaCompress(
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CONST UINT8 *Source,
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UINT32 SourceSize,
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UINT8 *Destination,
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UINT32 *DestinationSize
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)
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{
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SRes LzmaResult;
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CLzmaEncProps props;
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SizeT propsSize = LZMA_PROPS_SIZE;
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SizeT destLen = SourceSize + SourceSize / 3 + 128;
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if (*DestinationSize < destLen)
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{
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*DestinationSize = destLen;
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return ERR_BUFFER_TOO_SMALL;
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}
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LzmaEncProps_Init(&props);
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props.dictSize = LZMA_DICTIONARY_SIZE;
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props.level = 9;
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props.fb = 273;
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LzmaResult = LzmaEncode(
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(Byte*)((UINT8*)Destination + LZMA_HEADER_SIZE),
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&destLen,
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Source,
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SourceSize,
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&props,
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(UINT8*)Destination,
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&propsSize,
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props.writeEndMark,
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&g_ProgressCallback,
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&SzAllocForLzma,
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&SzAllocForLzma);
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*DestinationSize = destLen + LZMA_HEADER_SIZE;
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SetEncodedSizeOfBuf((UINT64)SourceSize, Destination);
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if (LzmaResult == SZ_OK) {
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return ERR_SUCCESS;
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}
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else {
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return ERR_INVALID_PARAMETER;
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}
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}
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